Glass-lined container for corrosive substances



Sept 8, 1948. P. E. KNUDSENV 2,450,146

GLASS-LINED CONTAINER FOR CORROSIVE SUBSTANCES Original Filed 001.. 19,1943 s She'ts-Sheet 1 r I I l INVENTOR. P fiQ [IMW/DJEN A? 7' TOE/VEKSept. 28, 1948.

P. E. KNUDSEN GLASS-LINE) CONTAINER FOR CORROSIVE SUBSTANCES OriginalFiled Oct. 19, 1943 s Sheets-Sheet s M @J m w. u 0 a d W 2 2 w J. a, v uI/ l/ l/ l/ l/ I/ I l l/ ha 7 5 Z Z a W 2 0 0 a 3 9 I 4 z W O g 3. Z W 27 F O Z M I N V EN TOR.

i atenied Sept. 28, 1943 GLASS-LINED CONTAINER FOR CORROSIVE SUBSTANCESPercy E. Knudsen, Pittsburgh, Pa, assignor to Pittsburgh Plate GlassCompany, Allegheny County, Pa... a corporation of Pennsylvania Originalapplication October 19, 1.943, 'Serial No. 506,792. Divided and thisapplication Septembet .6, 1944, Serial-No. 552,844

, 2=Claims. 1

The present invention relates to the construction of containers forliquids, e. g., corrosive substances, such as pickling acids, cleaningsolutions, plating baths, or for other materials of like nature, and ithas particular relation to the provision of containers of the foregoingtype in which a shell of wood, metal, concrete, or the like is lined byrelatively heavy plates of glass providing a surface which is highlyresistant to attack.

One object is to provide a container, -the contents of which can easilybe inspected.

A second object is to provide improved means for spacing the lining andthe outer shell of such containers.

These and other objects will be apparent from consideration of thefollowing specification and claims.

It has heretofore been proposed to form containers for various types ofacids and solutions by setting plates of glass, preferably tempered,inside a container in somewhat spaced relation with respect to thewall-s of the container, in order to provide a lining and then to fillthe space between the plates and the shell with a resistant plasticsubstance, such as high melting asphalt or plasticized sulfur, pouredin'white molten and allowed to set to a solid state.

The present invention contemplates as one feature the provision of sightholes or inspection windows for such containers in which the continuousplates of glass constituting the lining function as a transparentclosure medium permitting the free passage of light into the contents ofthe tank.

As a further feature, the invention involves the provision of adjustmentscrews operable exteriorly of the tank for securing the glass platesconstituting the tank lining in spaced relation with respect to thewalls.

For a better understanding of the invention reference may now be had tothe accompanying drawings in which like numerals refer to like partsthroughout and in which Fig. 1 is an elevational' view illustrating atank constructed in accordance with the provisions of the presentinvention; Fig. 2 is a. fragmentary sectional view taken substantiallyupon the line II-II of Fig. 1; Fig. 3 is a fragmentary sectional viewtaken substantially upon the line III-III of Fig. 1 and illustratingtheconstruction of a corner of the tank.

In the embodiment of the invention shown a wooden shell H] includes sidewalls of relatively heavy planks or boards II, which are rabbetedtogether as indicated at ['2 in Fig. 3 to provide a corner structure.The corners are further rein- (Cl. 220-15 e forced and secured togetherby vertical bars iii of wood secured to the boards II by means of screwsHi. The side walls may also be reinforced by means of horizontal rods orbolts l6 and vertical bolts l! which, at their extremities, are providedwith nuts l8 countersunk as indicated at it into the wood. The nuts ofthe horizontal bolts are covered by the bars I3, while the upper nuts oithe vertical rods are covered by coping bars 20.

The bottom of the shell is also formed of wooden planks 2! which, attheir extremities, rest upon bars 22 of wood or the like. The lower nutsof the bolts I? are countersunk in these later bars.

The lining of the tank, as shown in Fig. 3, includes thin plates 23 ofglass bearing against the inner surface of the wooden shell and plates24 spaced therefrom, and preferably of relatively heavy plate glass,which should be tempered in order to render it resistant to heat shock.The vertical edges of the latter plates are beveled as indicated at 25and their upper edges are secured in grooves in coping bars 20 so thatthey cannot fall inwardly. The space between the thin plates and theheavy plates is filled with a mastic or plastic composition 26,preferably of high melting asphalt or a plasticized sulfur, which ingeneral is highly resistant to chemical attack and also serves totransmit stresses from the lining plates to the outer shell as well assealing all joints between plates.

It is to be observed that the plates 23 and 24 are held in suitablyspaced relation with respect to each other by means of round pointed setscrews 21, which are threaded through nuts 23, countersunk in openings29 in the inner face of the walls of the shell. Said screws includeindentations 21a for a screw-driver by means of which screws may beadjusted to obtain accurate spacing of the plates and to hold the platesfrom rattling during or prior to the operation of pouring the heatedasphalt 26. The rear extremities of the set screws may be protected bymeans of plugs 30 of wood or the like, and the points may have caps 39aof lead to protect them.

The lining of the bottom portion of the tank may include slightly slopededge sections 3!, that comprise plates 32 and 33, which rest uponbeveled or wedge-shaped blocks or bars 34 upon the bottom boards 2! andare spaced by small sections 35 of glass. The space between the platesis filled with a mastic introduced while hot and fluid in a castingoperation. The bottom also includes a horizontal central section 36having a drain opening 31 formed therein, which opening registers with adrain structure 38.

An inspection window in the tank constructed in accordance with theprovision of the invention includes an opening 4|, which is but a smallsection of the tank wall, formed in the tank at an appropriate point,but which does not extend through the lining plate 24. The opening isshown as being rectangular with a horizontal lower edge and issurrounded by a frame 42 of wood or the like. Wooden bars 43 may beinserted between the inner and outer sheets of glass in order to providespacers. It is to be noted that the body of the thermosetting, e. g.,Bakelite, plastic 44 is disposed about the margins of the spacer members43, in order to prevent the possibility of molten asphalt fromcontacting with the wood of the members. This resin is applied whilestill plastic and adhesive. It is baked to thermostat stage, after thespacers and the plates are assembled.

As shown in dotted line in Fig. 1, the spacer bars 43 constituteflattened isosceles triangles that function to admit of the escape ofimprisoned air from under the lower edges of the bars as the moltenplastic is poured into the space between the outer shell and the innerlining. Screws 45 secure the frame to the spacer bars 43 and also screws41 function further to secure the frame to the edges of the opening.

Under some conditions there might be a possibility of breakage of theliner plate 24, which would permit the escape of the contents throughthe opening in the tank wall. In order to safeguard against suchoccurrence a safety plate 48 is provided. This plate at its marginsrests against the frame 42, and it may be locked in place by means of asecond frame 49 of wood or the like, which is secured in place tohorizontal reinforcing bars and vertical bars 52 by means of screws 53.These reinforcing bars are held in place by means of screws 54 threadedinto the walls of the shell and function further to reinforce the edgesof the opening. As best shown in Fig. 1, the horizontal bars 5| are ofsuch length that they can be mortised into the vertical corner bars 13.The vertical bars 52 are also mortised into bars 5 l The construction ofthe tank herein shown is substantially self-evident. The wooden shellisfirst built up, after which the thin plates 23 are disposed in the shellin contact with the wood. The heavy inner plates 24 are disposed inposition and the set-screws 21 are then adjusted to obtain the desiredspacing and to insure contact between the face of the glass plates andthe points and screws. The plastic, such as asphalt of high meltingpoint, is fused at a temperature at which it is highly fluid andis thenpoured into position.

points in chemical reactions can thus be observed with considerableaccuracy.

The forms of the invention herein shown and described are to beconsidered merely as by way of example. It will be apparent to thoseskilled in the art that numerous modifications may be made thereinwithout departure from the spirit of the invention or the scope of theappended claims.

This application is a division of my copending application Ser. No.506,792, filed October 19, 1943, issued as Patent No. 2,385,924.

I claim:

1. A container structure comprising an outer reinforcing shell and alining of glass plates disposed in the shell in spaced relation withrespect to the shell, the space between the shell and the lining beingfilled with mastic, spacing screws threaded through the shell and beingoperable from the exterior thereof and having points engaging the facesof the lining plates to hold them in predetermined position with respectto the walls of the shell.

2. A container'structure comprising an outer reinforcing shell and alining of glass plates disposed in the shell in spaced relation withrespect to the shell, the space between the shell and the lining beingfilled with mastic, spacing screws threaded through nuts countersunk inthe inner face of the shell and being operable from the exte-- riorthereof and having points engaging the faces of the lining plates tohold them in predetermined position with respect to the walls of theshell.

PERCY E. KNUDSEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,262,009 Brady Apr. 9, 19182,364,014 West Nov. 28, 1944

